Replace yuzu.exe with the path to the yuzu appimage, no other changes

Yes, the steps are [game] > preferences > run command on start > yuzu.exe….

I think I could help you with that, if you don’t mind me taking away the novelty of you coding your own solution, which is where I get my kick

If you can find a way to connect an SSD to the deck, I’m not sure if it’s SATA or whatever, if it’s connected and recognized, I don’t see a reason why the deck couldn’t boot from it. Not speaking from personal experience, all hypothetical, I could be wrong. Worth a shot if you understandably don’t want to do a fresh windows install